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USC: Pollution, stress contribute to low birth-weight babies for Hispanics

by The AV Times Staff • October 25, 2022

Air pollution and stress contribute to low birth-weight babies for Hispanic women in Los Angeles County, according to a USC study published Tuesday, Oct. 25.

The findings suggest that protecting pregnant women from air pollution may improve birth weight, especially among stressed-out mothers living in environmentally burdened neighborhoods.

“Although air pollution has a harmful effect on many different populations, our study identified the effects on expectant mothers who are already most vulnerable,” said Zhongzheng (Jason) Niu, postdoctoral scholar and research associate at the Keck School of Medicine of USC, and the study’s first author.

“The addition of high perceived stress is another factor contributing to this issue,” he said. “We already know air pollution is linked to low birth weight and future disease risk. Protecting pregnant women from these risks would ultimately protect future generations.”

Newborns with low birth weight face increased risk of neonatal mortality and potential complications such as breathing problems, bleeding in the brain, jaundice and infections. Low birth weight is also associated with long-term disease risks including diabetes, heart disease, high blood pressure, intellectual and developmental disabilities, metabolic syndrome and obesity.

The study — published in the JAMA Network Open medical journal — used data from 628 predominantly low-income Hispanic women pregnant with a single baby. The data were collected between 2015 to 2021 as part of USC’s Maternal and Developmental Risks from Environmental and Social Stressors Center.

Patients were recruited primarily from Eisner Health in downtown Los Angeles and the LAC+USC prenatal clinic. The average age of participants was 28 years; 73% self-identified as Latino and 32% listed Spanish as their preferred language. Twenty-one percent of the mothers reported high levels of stress in their lives. More than 60% of the participants lived in a neighborhood with a CalEnviroScreen Score greater than 50, indicating a high cumulative burden.

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Filed Under: Health, Home, Los Angeles County

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